Note that despite the "Open" in the project name, there's no consensus in favor of this project. For instance, the Free Sofware Foundation consider the Open Directory License as non-free: "This is not a free documentation license. The primary problems are that your right to redistribute any given version is not permanent and that it requires the user to keep checking back at that site, which is too restrictive of the user's freedom." (http://www.gnu.org/philosophy/license-list.html)